Can somebody please help me with this question. Part a-d. Thank you so much.

4. Using the entire data set of 65 stocks, count up the number of stocks in your data that have a high stock price that is at least $20. State this value here: 30 Verify this by copying the stem-and-leaf display for the high prices below. Stern and Leaf Plot of High LeafDigit Unjt= 10 W 12 6 represents 1260 Median 17.680 mm Depth Stem leaves {58) O 0000000000000000111111111lllllllll122222222233333344445666 00456 . 7 2 2 2 2 2 2 2 2 \\Om-{IGUI-h-LMM iii 6 65 cases included 0 missing cases a. Suppose it is desired to determine if the true percentage of all stocks that have high prices that are at least $20 differs from 40%. Is the sample size large enough to conduct this test? Why or why not? Show your calculations for full credit! HYPOTHESIS TEST IN STATISTICS b. Use the table on the next page to locate the number of your stocks with high prices of at least $20 in your sample. Use the table to locate the Test Statistic that you should use for this test and write it here: Test Statistic; 1.01_ c. Give the rejection region for this test (you choose an acceptable level for 0.). d. In the words of the problem, give a practical conclusion for this test. Make sure to include your choice of a in this conclusion